A New Office Building Opens, and People Are Falling Ill

A new office building opens, and people are falling ill with cough, headache, and dizziness. Research reveals no physical cause. With your knowledge of how mass psychogenic illness works, which of the following might you recommend

A) further study, retesting all features that have already been tested
B) recommend destroying the building and rebuilding from scratch
C) announce that you've discovered the source, making up false details as needed, and that you've fixed the problem
D) begin disciplining people who claim to be sick